Wrench.



G. GRINNEN.

WRENCH.

APPLICATION FILED 00122, 1912.

ammo; 6902 522 firinnen.

Patented Feb. 25, 1918.

-fll

onnsn enrnnnn, or wrmarnoron, nntnwan-a.

To oZZ whom it may concern.-

Be it known that i, Gnnsn. GRINNEN, a citizen of the United States,residing at ll ilmington, in the county of Newcastle and State ofDelaware, have invented certain new and useful Improvements in Wrenches,of which the following is a specification.

My invention relates to improvements in wrenches, the object of theinvention being to provide an improved quick adjustable wrench having animproved mounting for a worm carried by the movable jaw and normally inengagement with a longitudinal series of ratchet teeth on the bar of thewrench, so that the movable jaw may be quickly moved toward the fixedjaw by slidin the movable jaw on the bar, the worm riting over theratchet teeth of the bar.

A further object is to provide improved means for moving the worm out ofengagement with the ratchet teeth.

A further object is to provide the movable j aw of the wrench withinwardly projecting ribs at both sides movable in longitudinal groovesin the bar of the wrench to maintain the movable jaw in proper positionand prevent a lateral movement which might interfere with the properengagement of the parts.

A further object is to provide on the bar an improved handle which issecured to the handle and operates to close the ends of the grooves inthe bar, limiting the movement of the movable jaw in one direction.

With these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1 is a view in side elevationillustrating my improvements. Fig.2 is a viewv in longitudinal sectionthrough the movable jaw and handle showing the bar of the wrench inelevation. Fig. 3 is a view in cross section on the line 33 of Fig. 2,and Fig. 1- is a view in cross section on the line i i of Fig. 2.

1 represents the longitudinal bar of the wrench havin a fixed jaw 2 atone end and at opposite sides provided with longitudinal grooves 3.These longitudinal grooves 3 extend from the fixed aw 2 to a pointremoved an appreciable distance from the opposite end of the bar, andthe bar at this last-mentioned end is or a thickness the Specltlcationof Letters Patent.

Application filed octc'oer 28, 1912.

Serial No. 781%? same as the thickness of the loar between the innerwalls of the grooves. In other words, the parallel enlargements l, 4, onthe sides of the bar 1 which form the grooves 3 terminate at a distanceremoved the end of the bar, and on this'narrower end of the bar, thehandle 5 is located. This handle is secured in lace by a bolt 6 which isscrewed into a nut and said nut 7 and the head 8 of the bolt arecountersunk in opposite sides of the handle.

The movable jaw 9 of my improved wrench is mounted to slide upon the bar1, and is provided on its inner opposed faces with inwardlyprojectingribs l0 which ill) the grooves 3, and while they permit the.movable jaw to slide freely on the bar, they I hold the movable awagainst lateral movement.- The jaw 9, in one face, is recessed as shownat 11, and in this recessed portion of the jaw, an adjusting worm 12 islocated. The worm 12 has trunnions 13 and let at its ends, the outertrunnion located in a recess 15 in the movable jaw. V

It will be noted that the cylindrical end 12 of the adjusting worm 12hears normally against an inclined surface or wall 12? so that when theworm is in its holding position, this :endwill hear fiat against theni'ovable jaw and sustain the strain throughout its entire diameter,thus rendering the device strong and durable. Furthermore, it will henoted that when the worm is in locking position, its axis is slightly atan angle to the axis of bar 1, so that the movement of lever 18swingsthe threads of the worm entirely out of engagement with the teeth22 on the bar as will more fully hereinafter appear.

The trunnion 14 projects into a hollow portion or chamber 16 in themovable and rests in a recessed foot 1? on the end of an l shaped lever18. This L-shaped lever 18 is pivoted upon a transverse pin 19 and itslonger end projects through a slot 20 in the movable jaw, so that-theend of this lever may be conveniently moved to move the worm laterally.

A coiled spring 21 is located in the chamber 16 and exerts an inwardpressure on the trunnion 14 and the foot 17 to hold the worm in normalengagement with a longitudinal series of ratchet teeth 22 on the bar 1.

It will be noted that the convolutions of 'the worm 12 have one beveledand one approximately in shape in longitudina sition desired, the wormmay he turned 4 slightly to so position the jaw When it is other end ot'the bar, a longitudinal series desired to move the movalole jaw towardthe handle,'the lever 1% is swung on its pivot 19 to move the worm 12out or engagement with the teeth 22, andwhen the lever is so held, themovable jaw may he slid along the bar 1 toward the handle, and when thelever is released, spring 21 will return the worm to locked engagementwith the teeth, 7

By reason of the construction of groove 3, above referred to, it will henoted that the movable jaw 9 may he readily moved into position on thebar 1 by sliding the same onto the handle end of the bar when the handleis removed, but when the handle is secured in position on the bar, thehandle operates to close one end or each groove and prevent the movementor" the jaw beyond the handle.

Various slight changes might be "made in. the general form andarrangement of parts described. without departing from my invention, andhence ll do not limit myself to the precise details set forth, butconsider self at liberty to malre such changes and alterations as fairlyfall within the spirit and scope of the appended claims Having thusdescribed my invention what I claim as new and desire to secure hLetters Patent is:

l. A wrench comprising a bar, a liael on one end of the bar, a handle onthe end of the har, a longitudinal series of rate teeth on the bar, amovable jaw moun to slide on thehar, a pivoted lever carried by themovable jaw, a worm normally in engagement with the ratchet teeth, said.worm having trunnions at both ends, said jaw having a recess receivingone of said trunnions, said pivoted. lever supporting the other of saidtrunnions, and a spring hearing against said last-mentioned trunnionnormally pressing the worm into engagement with the said teeth on thebar, substantially as described,

2. it wrench comprising a hat, a lined jaw on one end of the bar, ahandle on the ct ratchet teeth on the bar, a movable jaw mounted toslide on the bar, a pivoted lever a t intense carried by the movablejaw, a worm normally in engagement with the ratchet teeth, said wormhaving trunnions at both ends, said jaw having a recess receiving one ofsaid trunnions, said pivoted lever supporting the other of saidtrunnions, a spring hearing against said last-mentioned trunnionnormally pressin the worm into engagement with the said teeth on thebar, said loar having longitudinal grooves in its opposite faces, andlongitudinal ribs on the inner face of the' movable jaw fitting thegrooves in the bar and sliding therein, said har having a reduced handlereceiving end, a handle on said end closing the ends of saijl grooves,said trunnion supporting lever 15 general Lehape pivotally supportedadjjcent the angle of the lever, and the shorter end of said leverhaving a bearing therein against which the trunnion is pressed by thespring, substantially as described.

3, A'wrench comprising a bar, a fixed jaw on oneend of the bar, a handleon the other end of the bar, a longitudinal series or ratchet teeth onthe bar, a movable jaw mounted to slide on the bar, a pivoted levercarried by the movable jaw, a worm normally in engagement with theratchet teeth, said worm having trunnions at both ends, said jaw havinga recess receiving one of Said trunnions, said pivoted lever supportingthe other of said trunnions, and a spring bearing against saidlast-mentioned trunnion normally pressing the worm into engagement withthe said teeth on the bar,

worm when in looking position having its at an angle to the axis of thebar, nd said worm having one end positioned p inst an inclined surfaceon the movable jaw, substantially as described.

l. A wrench comprising a bar, a fixed jaw on one end or the bar, ahandle on the other end of the bar, a longitudinal series of ratchetteeth on the bar, a movable jaw mounted to slide on the bar, a wormnormally in en gagement with the ratchet teeth, said worm havingtrunnions at both ends, saidjaw having a recess receiving one of saidtrunnions, an lmshaped lever tulcrumed at its angle and having itsshorter member supporting the other said trunnions, a spring pressingthe worm toward the ratchet teeth, and said worm when in lookingposition having its axis at an angle to the axis of the bar, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses,

onnsn oiarunnu.

Witnesses:

hi. dnnnnvs, Arm-mo W'rranrnnev.

Ill

